Swaging machine



F. M. RUTH 7ZL283 y SWAGING MACHINE Filed July so. 1927 s sheets-sheet1' 5/ O j f f f4 J f" 37 49 Je. Q

/m/f/VTOP wym Filed July 30, 1927 5 Sheets-Sheet Patented July l, 129.

- crease the diameter, the section of the swaging process,

. tion so that when the thread is rolled it will lframe being omitted.Fi 2 shows o N y .1.721,2831 Ni STATES PATENT oFF-CE.

FRANK M. RUTH, or STERLING, ILLINOIS, .AsSICNOR To RUSSELL, EURDSALL avWARD BOLT a NUT COMPANY, or' PORT CHESTER, NEW YORK, 'A CORPORATION OI'NEW YORK. Y y

swAGINe MACHINE.

Application filed July 30,1927. Serial No. 209,431.

spindle with a blank between one pair of dies.l Fig. 5 is across-section on the plane indicated by the dotted .line 5--5v on Fig.

4 showing the rack and pinion for rotating the spindle. Fig. fshows thejawsat the end of the spindle closed upon a blank, and the means `forclosing the' jaws. Fig. 7- l shows a plan of the dies and the means forrotating them. Fig. 8 shows the means which Connects the driving.mechanism with the Shafty which carries the cams that raise y and lowerand rotate the spindle. Fig. l9

is a front elevation of'a pair of the .dies with portions broken away.Fig. lOiS a top view of `a pair of the dies with portions brokenv away.Fig. 11 shows the face of one of the dies and Fig. 12 shows the face ofthe t other die .of each. pair. Fig. 13 shows a. blank before it issubmitted to the action of this machine. Fig. 14 shows a blank after 75it has been operated upon in this machine. Fig. 15 shows a lag screwmade from one of these blanks. f v With the mechanism headed blank 1 isswaged tatable dies 3 and 4 which elongate and rer d uce the diameter ofthe section 5 and form thepoint 6, which-section and 'oint-are to besubsequently provided with te thread 7. (Figs. 13-15.) he dies are setv'in 85 pockets in the heads 8 atv the front ends of parallel shafts 9and 10 that are, mounted in bearingsin the frame 11. The die shafts areprovided with intermeshing gears 12 and 13 `so vthat the will rotate inunison 9o and one ofthe shafts has a driving pulley 14 (Fig. 7). Theperimeters ofthe dies are formed onarcs concentric withthe axis of theshafts, and the die cavities, one-half of which is in each die of aslet, are similarly 9'5` curved.I Itis preferred, for the purpose ofreducing the cost of manufacture and also' to permit the readysubstitution of dies i which will formV differently shaped points, tohave each die `made of two members, one, 100v 15, containing the curvedand semi-circular cavity 16 for swa 'ng the body of the blank andthelother, 1 having a conical 4cavity h18 for forming the point.V (Figs.9-12.)

The blank 1 is fed to jaws 19 that are detachably fastened to arms 20which are heldby pivots 21 in an opening in the head 22 at the lower endofV the spindle 23. The' srpindle is"`lowered, raised, androtated so tThis invention 'relates to a machine which is particularly designed for,by a producing pointed lag screw blanks although it is equally adaptedfor forming Vblanks for other large screws and bolts with pointed orrounded ends.

In the commercial {production of? such screws and bolts in largequantities it is customary to roll the threads rather than cut thethreads on the blanks. As the threaded section of the screw should notbe larger in diameter than the shank section which :is not threaded, androlling threads tends to inblank which is to be thus threaded is reducedto less diameter. than the shank sechave the desired diameter. I

vThe object of the present invention is to provide an automatic machinewhich will rapidly produce pointed lag vscrews and bolt blanks ofaccurate size and condition to be immediately threaded by a threadrolling machine. 7

In the embodiment of the invention illustrated headed blanks of circularcross-section and slightly' shorter than the finished articles, are fedone at a time to o ened. jaws mounted on the end of ak vertlcally"floating spindle. When ythe. jaws are closed on the blanks the S indleis dropped to lower the end ofthe lank into the path of two pairs ofrotatin dies which reduce the section to be. threa ed and point thevend. After one pairof dies has actedon two opposite sides of the blankthe spindle lis raised, then rotated 90 and again lowered so that thesecond pair of ldies will act upon the other sides of the blank andwill; reduce 4 it uniformly and.retain its circular crosssection. Thespindle isagain' (raised and rotated 90 and the jaws opened to dischargethe swagedblank and .receive a fol lowing blank.

Fig. 1 of` the accompanying drawlngsV shows a-planof so much of themechanism of the machine as is necessary to an understanding of theinvention, the machine `illustrated the by two sets of rolarger Scale asection `of t e spindle wit l the blank Carr ng jawsl o ened. Fig. 3shows a side e evation of t e)spindle and the mechanism for liftinlowering and rotating it and opening t e jaws. Fig. 4 shows. a frontelevation of the dies and at first' one set of 110:'

by any suitable means 1o5 l dies and ythen the other set of dies actupon the blank for reducing and pointingthe secraised by a spring 27that thrusts between a collar 28 in the spindle and a sleeve 29 fastenedto the upper end of the rod. (Fig. 2.)

Attached to the lowerend of this rod is a double-wedge 30 that isadapted, as the rod `is raised by the thrust of the spring, to en.-

gage the rolls 25 and spread the upper ends of the' arms and causethejawsto close as illustrated in Fig.v 6. When the .rod' is forced downagainst the thrust of the spring its lower end engages the shoulders 24and 7 causes the jaws to open as illustrated `in Fig.

2. Normally the jaws remain closed under the thrust of the-spring, butwhen the spindle is raised they are opened for discharging a swagedblank and receiving another, by

the engagement with the screw` 31 threaded into the sleeve attached tothe upper end of the rod, of the lower en d of a screw 32 in the frontend of a lever-33. (Fig. 2'.) This lever is mounted on a pivot 34 `inthe frame and its rear end carries. a roll 35 which is .engaged by a cam36 on the cam shaft 37. (Fig. 3.) This cam is timed so that the jaws areopened at every alternate rise of the spindle. y

-A collar 38 is fastened to the spindle and engaging with this collar isthe forked end of a lever 39 which is mounted on the pivot 40 and hasaroll 41 that is engaged by a cam 42 on the cam shaft 37. This cam isVshaped to lift the spindle twice during each rotationof the cam shaft.(Fig. 3.)

Splined on the spindle is a gear 43, the

hub of which is rotatably heldin a bearing f in the frame. The spindleis. free to. reciprocate vertically through '.this gear but is rotatedthereby. Engaging with the gear is a rack 44. (Fig. 5.) This rack moveshorizontally through the frame and at its rear end is connected by alink 45 with an arm 46 that forms a part of the llever 47 which ispivoted at 48 and bears a roll 49` en aged by the cam on the cam shaft.ig. 3.) The'arm 46 is held in engagement with the. lever 47 by a. spring51, and

the roll 49 on the lever is held against they cam by afsp-ring 52.

This cam 50' is timed so as to, through the lever and rack 'and gear,oscillate the spindle on its axis'90 at each Jupward movement of thespindle. The elastic connection between the armand the lever allows theparts tn yield should any obstruction prevent the spindle from ro' i theaxis-of revolution of the dies, mechon one end has a bevel 4complementary tating.l

The cam shaft r 53 that engages with a bevel gear 54 on t e uplper endof a'vertical shaft 55. (Figs.

After a blank "the spring `blank into the path of the dies.

.up of two members,

a spiral gear 57 on the die shaft 10, (Figs. 7-8), Vwhich through thegears 12, 13 is driven by the pulley 14.-

The cams are so timed that the spindle 23 is raised and the upper end ofthe rod 26 is engaged by the lever 33 and the jaws 19 opened -bythelower end of the rod. has been placedfbetween the jaws7 therod in thespindle is lifted by jaws so as to hold theI blank. The spindle thendrops, carrying the lower end of the One set of the swaging dies comesaround and 'reduces and elongates the blank and at the same time pointsthe end of the blank. After one set of dies has acted on two oppositesides of the blank the spindle is raised and rotated 90 and then allowed.to dropdown in time'forthe second set of dies to engage the blanktheylift lthe blank 27 and the wedge 30 closes the and after the blankpasses above the dies 'the cam and lever li'ft the spindle stillfurther. -V

By the mechanism described lblanks for ico lag screws and bolts may beswaged very rapidly and produced in condition for subsequently rollingthreads upon the swaged and pointed sections.

the members which produce the points can be cheaply made, and differentpointing dies with various shapes may be readily substituted forproducing the desired ends of the blanks.

The method of swagingv described ac- With each die made curatelyreducesthe sections of the blanks which will be increased when vthey arethreaded in the thread rolling machine ,and at the same time points theblanks so that they are in condition to be immediately inmachinepreviously used.

The invention claimed is? 1. A machine for swaging headed each headvcarryingv two sets of dies, all of which dies are mounted to revolve inthe same vertical plane which is transverse to anism for rotating the fheads s'o that. the dies will coact o'n the-blanks on their upwardtravel, a 'spindle movable 8.) This vertical shaftat its lowervertically above and toward and from the.

troduced into the thread roller, thus eliminating the use o theindependent pointing4 i 12o blanks which comprises apair of rotatableheads,-

' heads,

vthe spindle and adapted to averse/af. l

dies twicel during` each `'rotation yof 'the on each upward movement ofthe spindle, fingers carried by `grip the blanks by their heads, andmechanism for opening and closing said-fingers on each valternate upwardmovement of the spindle.

2. A machine for swaging headed blanksv which comprises a pair ofrotatablel heads, two sets ofdies that have semi-cbnical cavities, allmounted to 'revolve in the each head carrying semi-circular and of whichdies are same vertical the axis of revolutionl of the dies, Imechamsmfor rotating the heads so. that the' complementary dies will coact onthe blanks on their upward travel, a spindle movable `1verticallyaboveand toward and from the dies twice during each rotation of the\heads,J

mechanism for rotating the spindle on its longitudinal axis 90 on eachupward movement of the spindle, fingers carried by the spindle andadapted yto grip the blanks by their heads, and closing said lingers oneach alternate upward movement of the spindle.

3. A machine for swaging headed blanks which comprises .a pair ofrotatable heads, each head carrying two sets of dies and each set ofdies being formed of two independently detachable-members, all' of whichdiesv are mounted to revolve in the same vertical plane which istransverse to theA axis -of which dies of the spindle, fingersrevolution ofthe dies, mechanismv for rotating the heads so thatthe'comp'lementary dies willcoact on the blanks on their ulpward travel,a spindle movable vertica Ily above and toward and from the dies twiceduring each rotation of the heads, mechanismv for rotating the spindleon its longitudinal axis 90 on each upward movement carried by thespindle and adapted to grip the blanks by their heads, and. mechanismfor opening and' closingf saidv lingers on each alternate up'- wardmovement of the spindle.

4. A machine for swaging headed blanks which comprises a pair ofrotatable heads, each head carrying twol sets of dies, all of aremounted to revolve in the same vertical plane which is transverse to'the axis of revolution of the vdles, mechanism for rotating the headsso that the complementary diesV will coact on the blanks on their upwardtravel, -a s indle movable vertically above and towar and from the diestwice during each rotation of the heads, means adapted to liftthespindle 'and permit the splndle to drop by gravity, mechanism forrotating the spindle on its longitudinal axis .90 l of the spindle,fingers carried bythe hspindle and adapted to grip the blanks by theirheads, and mechanism for opening vand closmechanism`for rotating thespindleon its longitudinal axis 90 J5. A machine for each head carryingplane whichn is transverse to and mechanism for openingl ment of -thespindle,

ment 'of the s on each upward movement` ing .said lin ers oneach-alternat'npward movement o the spindle: fzf' af! swaging headedblanks pair of. rotatable; heads ,f two sets of dies, all oi im whichdies are mounted to revolvein the samevertical plane which is transverseto which comprises. a

' the axis of revolution of the dies,' me'chanism for rotating the-headsso that the complementary dies will coa'ct onthe blanks on 7g theirupward travel, a spindle movable' vertically above and toward and Vfromthe` dies twice during each rotation `of the heads; mechanism forrotating the spindle on its longitudinal axis 90 0n each upward movementofthe spindle, fingers carried b the spindle and adapted to grip theIblan by their heads, a spring normally holding the lingers fclose ,sandmechanism engaged` on each alternate upward movement of the spindle for`opening the fingers.y

.6. 'A machine for swaging headed blanksI which comprises a pair ofrotatable heads each head carrying two sets ofdies, all oi which`l diesare mounted to revolve .in the same vertical plane which istransverse tothe axis of revolution of the dies, mechanism` for rotating'the heads sothat thelcomplementary dies will coact on the blanks on their upwardtravel, a s indle movable vertically above and toward and from the diestwice during each rotation of the heads, mechanism for rotating thespindle on its longitudinal axis on each upward movefingers carried btheI 10o spindle and adapted to grip the bl by their heads,a springnormally holding the lingers closed, a rod extending throng the spindle,and mechanism engaging said rod at eachalternate upward movement of thespindle and causing it to open vsaid fingers? 7. A machine orswagingheaded blanks which comprises a pair of rotatable heads, each headcarrying two sets of dies, all of which ydies are mounted to revolveinthe same vertical plane which is transverse to the axis of revolutionof 'theWdieaImechanism for rotating the heads sothat the. complementarydies will coact on the blanks on. their upward travel, a s indle'movable vertically aboye and towar and from the dies twice'during eachrotation 'of the heads, mechanism for rotating the spindle o`n itslongitudinal axis 90 on each upward moveindle, lingers carried by thespindle and a apted to grip the`blanks byl t eir heads, a. rod extendingthrough the spindle, a wedge on said rod adapted to open V and closesaid ngel-s, and means for reciprocating said rod on ,each alternateupward movement of the spindle. i

8, A machine for swaging headed blanks which comprises a pair-dofrotatable heads carrying a plurality of dies that have semi circular andsemi-conical cavities,y all of 130 imv which dies are mounted to revolvein the same vertical plane -which is transverse to the axis ofrevolution of thedies, mechanism for rotating ltheheads so that the com-C 5 plementary diesw-ill coact on the blanks on their upward travel, a sindle movable verticallyv above and towar and from the di twice duringeach rotation of the heads,

mechanism for rotating the spindle on its longitudinal axis 90 on eachupward mve- 10 ment of the spindle, fingers carried by 'the spindle andadapted to grip the blanks` by t eir heads, and mechanism-for openingand closing said fingers on each alternate up-V ward movement of thespindle.

r FRANK M. RUTH.

